wifi: ath12k: ath12k_bss_assoc(): MLO support

Currently, the ath12k_bss_assoc() function handles only deflink station
connections. To support multi-link station connections, make the necessary
changes to retrieve the required information from the link-level members.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.3.1-00173-QCAHKSWPL_SILICONZ-1
Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3

Signed-off-by: Aditya Kumar Singh <[email protected]>
Signed-off-by: Kalle Valo <[email protected]>
Link: https://patch.msgid.link/[email protected]

Author: Aditya Kumar Singh

drivers/net/wireless/ath/ath12k/mac.c

@@ -3133,7 +3133,9 @@ static void ath12k_bss_assoc(struct ath12k *ar,
 	struct ath12k_vif *ahvif = arvif->ahvif;
 	struct ieee80211_vif *vif = ath12k_ahvif_to_vif(ahvif);
 	struct ath12k_wmi_vdev_up_params params = {};
-	struct ath12k_wmi_peer_assoc_arg peer_arg;
+	struct ath12k_wmi_peer_assoc_arg peer_arg = {};
+	struct ieee80211_link_sta *link_sta;
+	u8 link_id = bss_conf->link_id;
 	struct ath12k_link_sta *arsta;
 	struct ieee80211_sta *ap_sta;
 	struct ath12k_sta *ahsta;
@@ -3143,27 +3145,38 @@ static void ath12k_bss_assoc(struct ath12k *ar,
 
 	lockdep_assert_wiphy(ath12k_ar_to_hw(ar)->wiphy);
 
-	ath12k_dbg(ar->ab, ATH12K_DBG_MAC, "mac vdev %i assoc bssid %pM aid %d\n",
-		   arvif->vdev_id, arvif->bssid, ahvif->aid);
+	ath12k_dbg(ar->ab, ATH12K_DBG_MAC,
+		   "mac vdev %i link id %u assoc bssid %pM aid %d\n",
+		   arvif->vdev_id, link_id, arvif->bssid, ahvif->aid);
 
 	rcu_read_lock();
 
-	ap_sta = ieee80211_find_sta(vif, bss_conf->bssid);
+	/* During ML connection, cfg.ap_addr has the MLD address. For
+	 * non-ML connection, it has the BSSID.
+	 */
+	ap_sta = ieee80211_find_sta(vif, vif->cfg.ap_addr);
 	if (!ap_sta) {
 		ath12k_warn(ar->ab, "failed to find station entry for bss %pM vdev %i\n",
-			    bss_conf->bssid, arvif->vdev_id);
+			    vif->cfg.ap_addr, arvif->vdev_id);
 		rcu_read_unlock();
 		return;
 	}
 
 	ahsta = ath12k_sta_to_ahsta(ap_sta);
-	arsta = &ahsta->deflink;
 
+	arsta = wiphy_dereference(ath12k_ar_to_hw(ar)->wiphy,
+				  ahsta->link[link_id]);
 	if (WARN_ON(!arsta)) {
 		rcu_read_unlock();
 		return;
 	}
 
+	link_sta = ath12k_mac_get_link_sta(arsta);
+	if (WARN_ON(!link_sta)) {
+		rcu_read_unlock();
+		return;
+	}
+
 	ath12k_peer_assoc_prepare(ar, arvif, arsta, &peer_arg, false);
 
 	rcu_read_unlock();
@@ -3182,8 +3195,7 @@ static void ath12k_bss_assoc(struct ath12k *ar,
 	}
 
 	ret = ath12k_setup_peer_smps(ar, arvif, bss_conf->bssid,
-				     &ap_sta->deflink.ht_cap,
-				     &ap_sta->deflink.he_6ghz_capa);
+				     &link_sta->ht_cap, &link_sta->he_6ghz_capa);
 	if (ret) {
 		ath12k_warn(ar->ab, "failed to setup peer SMPS for vdev %d: %d\n",
 			    arvif->vdev_id, ret);